I didn't hate her, but I can't say I liked her either. Yar was so artificial and unconvincing. Sela could be an interesting character, but Crosby's thin and delicate voice combined with not such a good acting just failed to deliver a possibly dreadful and dangerous Romulan. She was flat and unconvincing too.
Replacing Senator Vreenak - as someone suggested - would be a great loss for the episode. McHattie was awesome and Vreenak is one of my favourite Rommies.
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew